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Photocatalytic oil-water separation net film, preparation method and application thereof

An oil-water separation mesh membrane and photocatalysis technology, which is applied in separation methods, chemical instruments and methods, liquid separation, etc., can solve the problem of not being able to make better use of sunlight and other problems, so as to improve the carrier transmission efficiency and improve the transmission efficiency. , the effect of convenient follow-up processing

Active Publication Date: 2016-12-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since copper tungstate is an n-type semiconductor with a bandgap of 2.2eV, and cuprous oxide is a p-type semiconductor with a bandgap of 2.0eV, both can capture visible light well. n-junction, which improves the carrier transport efficiency and can degrade organic pollutants in water under visible light, which also solves the problem of traditional photocatalysts such as TiO 2 , ZnO can only be excited by ultraviolet light and cannot make better use of sunlight

Method used

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  • Photocatalytic oil-water separation net film, preparation method and application thereof
  • Photocatalytic oil-water separation net film, preparation method and application thereof
  • Photocatalytic oil-water separation net film, preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0041] A preparation of a photocatalytic oil-water separation omentum, comprising the steps of:

[0042] 1) Clean the 200-mesh copper mesh with 0.1mol / L dilute hydrochloric acid, absolute ethanol and deionized water for 15 minutes, and dry it with nitrogen for later use;

[0043] 2) With 0.1mol / L sodium tungstate solution as the electrolyte, the cleaned 3×4cm 2 The copper mesh is used as the anode, with a size of 3×4cm 2 The titanium plate is used as the cathode, and the anode and the cathode are respectively connected to the positive and negative poles of the power supply. The anodic oxidation method is used to electrolyze for 5 minutes at a constant voltage of 4V, and the electrolysis temperature is 25°C;

[0044] 3) After the electrolysis is completed, wash the anode with deionized water and dry it in a blast drying oven at a constant temperature of 50°C for 0.5h to obtain a copper mesh covered with a cuprous oxide / copper tungstate composite film layer.

[0045] The oil-w...

Embodiment 2

[0054] A preparation of a photocatalytic oil-water separation omentum, comprising the steps of:

[0055] 1) Clean the 300-mesh phosphorus copper mesh with 0.1mol / L dilute hydrochloric acid, absolute ethanol and deionized water for 10 minutes, and dry it with nitrogen for later use;

[0056] 2) With 0.005mol / L potassium tungstate solution as the electrolyte, the cleaned 3×4cm 2 The copper mesh is used as the anode, with a size of 3×4cm 2 The platinum sheet is used as the cathode, and the anode and the cathode are respectively connected to the positive pole and the negative pole of the power supply. The anodic oxidation method is used to electrolyze at a constant voltage of 20V for 20min, and the electrolysis temperature is 15°C;

[0057] 3) After the electrolysis is completed, wash the anode with deionized water and dry it in a blast drying oven at a constant temperature of 60°C for 1.0h to obtain a copper mesh covered with a cuprous oxide / copper tungstate composite film layer...

Embodiment 3

[0060] A preparation of a photocatalytic oil-water separation omentum, comprising the steps of:

[0061] 1) Clean the 400-mesh phosphorus copper mesh with 0.1mol / L dilute hydrochloric acid, absolute ethanol and deionized water for 12 minutes, and dry it with nitrogen for later use;

[0062] 2) With 0.01mol / L ammonium tungstate solution as the electrolyte, the cleaned 3×4cm 2 The copper mesh is used as the anode, with a size of 3×4cm 2 The graphite sheet is used as the cathode, so that the anode and the cathode are respectively connected to the positive and negative electrodes of the power supply. 2 The constant current electrolysis of 15min, the electrolysis temperature is 20 ℃;

[0063] 3) After electrolysis, wash the anode with deionized water and dry it in a blast drying oven at a constant temperature of 80°C for 0.6h to obtain a copper mesh covered with a cuprous oxide / copper tungstate composite film layer.

[0064] The water contact angle of the omentum prepared by the...

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Abstract

The invention discloses a photocatalytic oil-water separation net film, a preparation method and application thereof. The method comprises: firstly using diluted hydrochloric acid, anhydrous ethanol and deionized water to conduct ultrasonic cleaning on a copper net respectively and performing blow-drying with nitrogen; taking a tungstate solution as the electrolyte solution, using the cleaned copper net as the anode, and adopting an inert electrode as the cathode, connecting the anode and the cathode to the positive pole and negative pole of a power supply respectively, employing an anodic oxidation process to carry out constant-current electrolysis or constant-voltage electrolysis, then using deionized water to clean the anode and then performing drying, thus obtaining a copper net film covered by a cuprous oxide / copper tungstate composite film layer. The net film has super-hydrophilicity and underwater super-lipophobicity, and can efficiently separate oil-water mixtures. The invention utilizes the cuprous oxide / copper tungstate p-n junction structure to conduct photocatalytic degradation of organic pollutants in water under visible light, and realize the separation and purification of oily wastewater containing organic pollutants. The preparation process is simple, the raw materials are environment-friendly, and the cost is low.

Description

technical field [0001] The invention particularly relates to an oil-water separation membrane, in particular to a photocatalytic oil-water separation membrane and its preparation method and application; it belongs to the technical field of chemical engineering and functional materials. Background technique [0002] With the massive discharge of oily and organic pollutant-containing waste water in production and life and the frequent occurrence of offshore crude oil spill accidents, the exploration and research of oil-water separation and the treatment of organic pollutants in aqueous solutions have become important issues related to people's lives, economic development and the environment. important issue of safety. Utilizing the special wettability of the material surface to oil and water, realizing oil-water separation has become one of the research hotspots in the field of interface materials, among which hydrophobic / oleophilic (oil-removing) materials are favored due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/40B01D71/02B01D69/02B01D67/00C02F101/30
CPCB01D67/0039B01D69/02B01D71/022C02F1/30C02F1/40C02F2101/30B01D2325/36Y02W10/37
Inventor 程江周才龙朱郑婷徐守萍皮丕辉文秀芳
Owner SOUTH CHINA UNIV OF TECH
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